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Statement of a problem № 2548

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Two identical railroad cars sit on a horizontal track, with a distance D between their centers. By means of a cable between them, a winch on one is used to pull the two together. (a) Describe their relative motion. (b) Repeat if the mass of one car is three times that of the other.

Solution:
Two identical railroad cars sit on a horizontal track, with a distance D between

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